Generally we only care whether the next object is a hidden prototype.
It's simpler to check whether the current object has a hidden prototype
instead of walking to the next prototype and checking its map.

BUG=

Review URL: https://codereview.chromium.org/1675223002

Cr-Commit-Position: refs/heads/master@{#33816}

R=cbruni@chromium.org

Review URL: https://codereview.chromium.org/1559923002

Cr-Commit-Position: refs/heads/master@{#33087}

Creating proto-recursive proxies might lead to instanceof while-looping
endlessly in Object::HasInPrototypeChain (For traps we already have stack
guards in place to prevent stack overflows). We prevent this by limiting
the number of proxies we visit in PrototypeIterator to a magic large number.

LOG=n
BUG=v8:1534

Review URL: https://codereview.chromium.org/1542583003

Cr-Commit-Position: refs/heads/master@{#33007}

We can no longer just walk the prototype chain without doing proper access-checks. When installing a proxy as the __proto__ of the global object we might accidentally end up invoking cross-realm code without access-checks (see proxies-cross-realm-ecxeption.js).

Review URL: https://codereview.chromium.org/1521953002

Cr-Commit-Position: refs/heads/master@{#32903}

Reland of [proxies] Make Object.prototype.isPrototypeOf work with proxies. (patchset #1 id:1 of https://codereview.chromium.org/1494283002/ )

Reason for revert:
Did not help...

Original issue's description:
> Revert of [proxies] Make Object.prototype.isPrototypeOf work with proxies. (patchset #2 id:20001 of https://codereview.chromium.org/1492863002/ )
>
> Reason for revert:
> [Sheriff] Speculative revert for:
> https://uberchromegw.corp.google.com/i/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/3225
>
> Can just be relanded if it doesn't get green.
>
> Original issue's description:
> > [proxies] Make Object.prototype.isPrototypeOf step into proxies.
> >
> > R=rossberg, verwaest@chromium.org
> > BUG=v8:1543
> > LOG=n
> >
> > Committed: https://crrev.com/4ca1180d2e7c409312ae0761cb12843989466573
> > Cr-Commit-Position: refs/heads/master@{#32569}
>
> TBR=rossberg@chromium.org,verwaest@chromium.org,neis@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:1543
>
> Committed: https://crrev.com/48fba9439f291edd5929e19951262dc7e8a09609
> Cr-Commit-Position: refs/heads/master@{#32588}

TBR=rossberg@chromium.org,verwaest@chromium.org,neis@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:1543

Review URL: https://codereview.chromium.org/1491743010

Cr-Commit-Position: refs/heads/master@{#32598}

Revert of [proxies] Make Object.prototype.isPrototypeOf work with proxies. (patchset #2 id:20001 of https://codereview.chromium.org/1492863002/ )

Reason for revert:
[Sheriff] Speculative revert for:
https://uberchromegw.corp.google.com/i/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/3225

Can just be relanded if it doesn't get green.

Original issue's description:
> [proxies] Make Object.prototype.isPrototypeOf step into proxies.
>
> R=rossberg, verwaest@chromium.org
> BUG=v8:1543
> LOG=n
>
> Committed: https://crrev.com/4ca1180d2e7c409312ae0761cb12843989466573
> Cr-Commit-Position: refs/heads/master@{#32569}

TBR=rossberg@chromium.org,verwaest@chromium.org,neis@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:1543

Review URL: https://codereview.chromium.org/1494283002

Cr-Commit-Position: refs/heads/master@{#32588}

R=rossberg, verwaest@chromium.org
BUG=v8:1543
LOG=n

Review URL: https://codereview.chromium.org/1492863002

Cr-Commit-Position: refs/heads/master@{#32569}

BUG=

Review URL: https://codereview.chromium.org/1330153003

Cr-Commit-Position: refs/heads/master@{#30676}

This way we don't clash with the ASSERT* macros
defined by GoogleTest, and we are one step closer
to being able to replace our homegrown base/ with
base/ from Chrome.

R=jochen@chromium.org, svenpanne@chromium.org

Review URL: https://codereview.chromium.org/430503007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22812 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=none
R=verwaest@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/390323002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22442 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The new pattern is that we first get the map of the root of the
prototype chain using Object::GetMapRoot() and then walk up the
prototype chain using Map::prototype().

BUG=???
R=verwaest@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/376233002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22365 ce2b1a6d-e550-0410-aec6-3dcde31c8c00